FLUKE 408B

The Fluke Model 408B High Voltage DC Power Supply is capable of providing an output of 0 to 6,000 Vdc at 0 to 20 mA. The output voltage is selected by four decade switches and a vernier potentiometer. The instrument may be operated with either positive or negative output terminal grounded, as selected by a front-panel switch. Overcurrent protection is provided to return the supply to standby operation in the event of excessive load current.

The Model 408B is a hybrid design utilizing silicon transistors for the amplifier circuitry and a vacuum tube for the necessary high voltage series passing element. A time-delay relay is incorporated in the input circuitry, which prolongs the life of the high voltage passing tube. The reference element is a highly stable temperature compensated gas tube.

SPECIFICATIONS
Electrical OUTPUT VOLTAGE
0 to +/-6,000 VDC

OUTPUT CURRENT
0 to 20 mA

OUTPUT POLARITY
+ or - grounded via front panel switch

LINE REGULATION
0.001% or 2 mV (whichever is greater) for 10% line change from nominal

LOAD REGULATION
0.001% or 5 mV (whichever is greater) for full load change

STABILITY
+/-0.005% per hour; +/-0.02% per day after warmup

RESOLUTION
5 mV

RIPPLE
Less than 1 mV RMS; less than 5 mv peak-to-peak

VOLTAGE CALIBRATION
0 to 5000V in 5 steps of 1000V
0 to 900V in 9 steps of 100V
0 to 90V in 9 steps of 10V
0 to 9V in 9 steps of 1V
0 to 1. 2V vernier

CALIBRATION ACCURACY
+/-0.25% or 250 mV (which-ever is greater) with vernier at zero

RESETABILITY
+/-0.05% or 50 mV (whichever is greater)

RECOVERY TIME
Within 50 uSec

WARMUP TIME
30 minutes

OVERCURRENT TRIP
Set to latch off at 25 mA load current. Internally adjustable from 5 to 25 mA

METER
6000-0-6000 vdc (+/-3%)

OUTPUT CONNECTORS
MS3102A-18-16S front and rear (one mating connector supplied)

INPUT POWER
100/115/230 VAC +/-10%, 50-5000 Hz, approx. 300 VA at full output



MECHANICAL HUMIDITY
0 to 80%

OPERATING TEMPERATURE RANGE
0' C to 50' C

STORAGE TEMPERATURE RANGE
-200' C to +70' C

ALTITUDE, OPERATING
0 to 10,000 ft

ALTITUDE, NON-OPERATING
0 to 50,000 ft

VIBRATION
Meets MIL-T-945A

SHOCK
Meets MIL-E-4970A (20 g's, 11 mSec in three principal axis)

TEMPERATURE COEFFICIENT OF OUTPUT
Less than 20 ppm per 'C from +10' C to +400' C

SIZE
19" wide x 8-3/4" high x 15" behind panel (rack mount with resilient feet for bench use)

WEIGHT
Approximately 59 pounds